Gas burner of multi section port construction



June 24, '1958 A. c. JACKSON ETAL 3,840,150

GAS BURNER 0F MULTI SECTION PORT CONSTRUCTION Fil ed May '7, 1953 s E wI 1 g I E? INVENTOR 14% q- Alonzo 0. Jackson a S N Francis E. Jackson \Efi r John A. Lasofer m6 Q BY ATTORN Y 2,840,150 GAS BURNER FMULTISEQCYTIION oRT Application 7,1953, Serial No. 353,487 I Claims.(Cl. %114) This invention relates to gas burners and has specificreference to such a burner fabricated of individual port sections(preferably formed of pressedsteel) .secured together'into an integralstructure that is aluminized following final assembly.

This novel burner organization has special application in (but is notrestricted to) the gas-fired house heating unit di'scl osedin copending'application Serial 5N0; 282,651, filed April 16, 1952,'u nder the titleof House Heating Unit land 'Automatic ControlT-herefor, now Patent No.2,700,505. In heatingunits of this type wherein several burners ofvaryingcapacitiesare employed, it is essential, in order to meetcompetition, that the burners be extremely economical to manufacture yethighly eflicien't and durable in operatiorilf The novel burner'herein'fdisclosed meets these: requirements with an extremely highdegree of satisfaction.

It is the generalobject of this invention to provide, a gas burner thatis very low in first cost, readily adaptable to manufacturing processes,and yet highly eflicient and durable in operation. '7

area relative to' that of the chamber for the passage of anair-gasmixture from the interior of the chamber. To

assist in maintaining the proper spacing between edges 16 and togiverigidity to the structure these edges are provided with inwardlyformed portions 19 that are held together by bending clip 21 formed onone of the portions over the rim of the other portion. I

Each of the walls 12- of eachport section is formed with an outwardlyprojecting circular portion or'rim 20 having an opening 22 providedtherein. When the several sections 10 that make up a complete burner arein assembled relation circular portions 20 of adjacent walls of adjacentsections are-in abutting relation andaresecured together in a fluidtight manner by crimping the edge forming opening 22 in one wall overthe edge forming the opening in the immediate adjacent wall, as clearlyshownin Fig. 1.

The opening 22 formed in the endmost wall of one of the end sections issealedby sheet metal member 24, held within said opening by a force fit,while the opening in the endmost wall of the other section is connectedto inlet duct 26 in a-fluid tight manner; the extremity of the ductbeing crimped over the edge of the opening for this purpose.

Positioned within port sections 10 and extending through theopenings 22is a suitable baffle 28, illustratively shown as a helical plate,effective to give an even velocity distribution to each of the portsections of the air-gas mixture entering the assemblage of sectionsthrough inlet duct 26.

In fabricating the burner it is unnecessary that the numerous joints bewelded since, with the pressures at I which these burners operate, anentirely satisfactory seal A further object is to provide a gas burnerfabricated entirely of pressed steel that is aluminized following finalassembly and 'that has individualportsections which may be built up asdesired to obtain, anecessary burner capacity. 7 i e Other and furtherobjectsQof the invention will become apparent to those skilled in theart' asthe description proceeds. I v 7 With the aforementioned objectsin view, the invention comprises an arrangement, constructionand'com'bination of the elements of the gas burner in such a manner asto attain. the: results desired as hereafter more particularlyset forthinlthe following detailed description of an illustrative embodiment;said embodiment being shown by the accompanying drawings wherein:

Fig; 1 is a longitudinal sectional view of the novel burner organizationdisclosingth'e interconnection of the individual port sections and thedisposition of the helical bafile within the port sections. a

Fig. 2'is a sectionalview taken*along line 2-2 of Fig. 1.

Fig. 3 is a plan view of a number of the individual port sections of theburner taken generally along line 33 of Fig. 1.

Referring to the drawings, wherein like reference characters are usedthroughout to designate like elements the novel burner is made up of aplurality of individual port sections 10 rigidly secured together toform an integral structure. Each of these sections has a generallyV-shaped transverse section (Fig. 2) and is made up of two parallel,pressed steel walls 12 having their outer edges bent toward each otherto define a chamber intermediate the walls. The lower or side edges 14of the walls of each section are in overlying relation with one of theseedges crimped over the other in a fluid tight manner as clearly shown inFigs. 1 and 3. The top edges 16 are maintained in spaced relation todefine an elongated slot 18 of restricted is obtainable with the crimpedtype of joint disclosed. It is thus evident that this burner is readilyadaptable to relatively inexpensive manufacturing processes and can beproduced extremely rapidly at a very low cost.

By building the burner of individual port sections great flexibility incapacity is provided since the capacity of a particular burner isobviously dependent upon the number of port sections of whichit iscomposed. Thus, in providinga heating unitwith burners of differentcapacities, such as. disclosed in the aforementioned application SerialNo. 282,651; each of the burners can be identical except for the number,of port sections. This tends to simplify the installation and reducesthe number ofdifferent parts contained within the unit resulting inlower first cost as well as lower operating costs.

During the manufacture of this burner, the port sections 10 and 12 arefirst stamped from sheet stee1;.these section plates arejoinedtogethercentrally at 22 in Fig. 1 and the required number of section assemblagesare secured together at 14 and 21, following placement of distributionbafile 28 in the port assemblage plus attachment of; airgas mixing tube26 to one end thereof and of end plate 24 to the other assemblage end;and all of these burner parts thus assembled are aluminized both insideand out by precleaning and then dipping into a bath of molten aluminum.In this way all surfaces of the entire burner (including plate edges,etc.) are effectively coated with the aluminum.

V Patented Jun v ties of the aluminized surface.

In fabricating the burner pressed steel, aluminized following burner,assembly is preferably ernployed because of its relatively low cost andthe extremely satisfactory results that havebeen obtained by its use.Inthe aluminizin'g process the base metal forms'anironf aluminum alloywitha coating of purealuminurn being depositedon the surface ofthe'met-alfl Withthis material it has been found that the ability of theburner to with- During operation of this novel burner an air-gas mixtureenters the assemblage of portsection through inlet duct 26. This mixturereceives 'a swirling motion by baflle 28' which evenly distributes it toeach ofthe charm:

The mixture then bers defined by the port sections. 7 passes from eachof saidchambers through; slots 18 Ma substantially uniform velocity,immediately thereafter mixes with secondary air, and burns with a short.even flame; v j

, While a preferred embodiment of the gas burner has been illustratedand described it isto be understood that f such is merely illustrativeand not restrictive and that variationsj'and modifications may be madetherein without departing from the spirit and scope of the invention.

It is therefore to be understood that the invention is not sectionsincluding a pair of generally V -shaped, parallel,

aluminized sheet metal wallshaving their edges bent M toward each othertherebyforming a chamber with the edges of said walls forming thetop ofthe V being spaced to form a slot of restricted section relative tothat'of the chamber for the egress of gas 'and the remaining edges beingsecured together in a fiuid tight manner by crimping one edge over theotherg the outlet edge of the slots formed in the severalsections beingcoplanar, said sections 'being disposed with their wallsparallel to oneanother with adjacent 'walls of adjacent sections being spaced andtogether with the end wall to which the inlet duct is secured havingaligned' openings, an outwardly raised rjm formed about each of saidopenings with the rims formed on adjacent walls of adjacent sectionsbeing secured together by having onerim crimpedover the other; and aspiral baflle positioned within said unit and extending through thealigned openings operable to evenly distribute to each of the" sectionsthegasentering the unit-through the inlet duct, said baflle being of awidth substantially equal to the, diameter of said openings.

planes and having a common transverse axis, each of said sectionsincluding a pair of dished generally triangularshaped sheet metal wallsfacing one another and secured together along two of the edges of thetriangle by crimping the edge of one wall over the edge of the otherthereby forming a chamber between the walls, the third edgeof thetriangle being spaced to form an elongated slot of restricted sectionrelative to that of the chamber for the egress of a gaseous fuel fromthe chamber, each ,of said walls having outwardly raised surface locatedintermediate said two edges and adjacent the apex formed 'by thejuncture of said .two edges with this surface of adjacent sections beingin abutting relation thereby spacing the major portion of adjacent wallsof adjacent sections fromfeach other providing a passage for the freeflow of air, said abutting surfaceshaving aligned openings formedtherein with the rim of one opening crimped over the rim of the adjacentopening, one of theendmost walls having an inlet opening, an inlet ductcoaxial with said openings and having its downstream end crimped overthe rim of the opening in saidendmost wall, and battle means extendingthrough said aligned openings and operative to evenly distribute thefuel to the several sections. p

3.,A gas burner as defined in claim 2 wherein the bafiie comprises aspiral metallic member having a width "substantially equal to thediameter of the aligned openingsv 41A gas burner comprising incombination a plurality of sheet metal sections disposed inparallelspaced apart planes, each of said sections including a pairof sheetmetal plates facing one anotherand dished toform a chamber therebetween,these plates being secured together along all but a portion. of theirperimetrical edges by crimping the edge of one plate over the edge ofthe other, said portions of said edges beingspaced to form a slot forthe egress of gaseous fuel from the chamber, an inlet duct connected'toone of the endmost plates,adjacent plates of adjacent sections beingspaced with the sections being in communication with each other throughopenjings in said adjacent plates with the openings being in alignment,an outwardly raised rim formed about at least one of the openings insaid adjacent plates with said adjacent plates being secured together byhaving the rim of one opening crimped over that of the other, and battlemeans extending through said aligned openings and operative to evenlydistribute the fuel to the several sections.

5. A gas burner as defined in claim 4 wherein the baffie comprises aspiral metallic member having a width substantially equal .tothediameter of the aligned openings.

References Cited in the file of this patent UNITED STATES PATENTS392,211 Lutz Nov. 6, 1888 :1,988,217 Sayles Jan. 15, 1935 2,646,842'Handley July 28, 1953 FOREIGN PATENTS 4,546 Great Britain 1901

